I'm experimenting with IPython notebook. I can't get LaTeX to work:
$$ x + 3 $$
File "<ipython-input-1-0f8a1bc96d90>", line 1
$$ x + 3 $$
^
SyntaxError: invalid syntax
I'm using Ubuntu 12.04 and ipython 0.12.1. If upgrading to 0.13 would solve my problem, please explain how to do that, as my attempts have failed.